Unknown Instrument Panel

[stephen f. polyak]

Seems a bit busy (# of holes) for a basic vintage glider/sailplane (if non-powered), and oxygen? Some might also question the use of metal vs. wood for the "info board". What's the shiny circular device in the center and what's marked on it (language)? Color = Luftwaffe? Rear view? Could it be a ground training prop?

A few odd notes to this item... it's relatively unusual for the instruments on period German panels to mount from the rear; O2 group lacks flow valve control knob; larger openings lack 6 o'clock cut notch for adjustment knob on altimeter and (sometimes) variometer (must have instruments in any a/c), and there doesn't appear to be but one opening for lesser switches/indicators.